Sharpening Stone Kasumi model 4315-uniw — Japanese whetstone for blade sharpening

Kasumi model 4315-uniw is a Japanese whetstone manufactured for manual blade sharpening and routine edge maintenance. The stone delivers a consistent abrasive surface for restoring cutting edges, refining bevels and removing burrs on a wide range of knives and utility blades. Designed for use on kitchen knives, pocket knives and other handheld cutting tools, the sharpening stone supports controlled abrasion to improve sharpness and prolong blade life.

Advantages

The Japanese whetstone offers a stable grit surface that ensures even wear and predictable sharpening results without aggressive stock removal. Its flat rectangular form provides a comfortable working area for consistent angle control during honing. The stone is suitable for both coarse re-profiling and finer finishing depending on chosen grit and technique, making it versatile for different blade steels and edge conditions.

Suitable for

• Restoring dull kitchen knives and chef’s knives
• Refining edge bevels on pocket knives and outdoor blades
• Deburring and smoothing utility and woodworking blades
• Routine maintenance of high-carbon and stainless steel edges

Key specifications

• Type: Japanese whetstone for manual sharpening
• Intended use: Edge restoration, bevel refinement, deburring
• Form factor: Rectangular stone suitable for hand-held sharpening
• Compatibility: Kitchen knives, pocket knives, utility and woodworking blades
• Performance: Provides controlled abrasion for predictable results

How to use

Soak or wet the stone as recommended for its abrasive type and place it on a stable, non-slip surface. Hold the blade at a consistent angle and draw the edge across the stone with even pressure, repeating strokes until the desired edge forms. Alternate sides regularly to maintain a centered bevel and check progress by feeling for a burr or testing on a suitable cutting test material. After sharpening, remove residual slurry, wipe the blade clean and, if applicable, strop or hone the edge for a finer finish.

Usage recommendations

Use the whetstone on a flat, secure surface and keep the sharpening angle consistent to achieve repeatable results. Begin with a coarser grit for damaged or very dull edges, then progress to finer abrasive surfaces for polishing and refining. Clean and dry the stone after use and store it flat to preserve its surface; periodically flatten the stone if uneven wear appears.